a)Tightly connect the indoor side refrigerant tubing extend- ed from the wall with the outdoor side tubing. (Fig. 47)
b)To fasten the flare nuts, apply specified torque as:
Table 5
Tube Dia. | Tightening Torque |
|
|
1/4" (6.35 mm) | Approx. 130 – 170 lbs.·in. (150 – 200 kg·cm) |
|
|
3/8" (9.52 mm) | Approx. 300 – 340 lbs.·in. (350 – 400 kg·cm) |
|
|
1/2" (12.7 mm) | Approx. 430 – 470 lbs.·in. (500 – 550 kg·cm) |
|
|
5/8" (15.88 mm) | Approx. 520 – 560 lbs.·in. (600 – 650 kg·cm) |
|
|
5-5. Insulation of Refrigerant Tubing
IMPORTANT
To prevent heat loss and wet floors due to dripping of con- densation, both tubes must be well insulated with a prop- er insulation material. (Fig. 48) The thickness of the insula- tion should be a minimum 5/16" (8 mm). (Fig. 49)
CAUTION | After a tube has been insulated, | |
never try to bend it into a narrow | ||
| ||
| ||
| curve, as this may cause the tube to | |
| break or crack. |
5-6. Taping the Tubes
a)At this time, the 2 refrigerant tubes (and electrical wire if local codes permit) should be taped together with armor- ing tape. The drain hose may also be included and taped together as 1 bundle with the tubing.
b)Wrap the armoring tape from the bottom of the outdoor unit to the top of the tubing where it enters the wall. As you wrap the tubing, overlap half of each previous tape turn. (Fig. 50)
c)Clamp tubing bundle to wall, using 1 clamp approx. every 47 in. (120 cm).
NOTE
Do not wind the armoring tape too tightly, since this will decrease the heat insulation effect. Also, be sure the conden- sation drain hose splits away from the bundle and drips clear of the unit and the tubing.
5-7. Finishing the Installation
After finishing insulating and taping over the tubing, use seal- ing putty to seal off the hole in the wall to prevent rain and draft from entering. (Fig. 51)
Torque wrench
Spanner
Indoor unit
Outdoor unit
Fig. 47
| Insulation |
| Fig. 48 |
| Insulation |
Min. | Thickness: |
5/16" (8 mm) | min. 5/16" (8 mm) |
Fig. 49
Clamp
Insulated tubes
Fig. 50
Apply putty here
Tubing
Fig. 51
17
